Both Pre-trigger Records and Post-trigger Records are set to zero by default. To configure the
waveform recorder for extended waveform capture, either or both of these setup registers must
be set to a non-zero positive integer value. If you do this, you must also set the Record Delay
Cycles setup register to zero in order to properly configure the extended waveform capture.
A Waveform recording triggered
B Waveform record captured at trigger
C Pre-trigger waveform records captured
D Post-trigger waveform records captured
The waveform log set for each triggered recording is equal to the sum of Pre-trigger Records +
Post-trigger Records + 1 (where 1 is the actual record when the Waveform Recorder module’s
Record input was triggered).
For example, if Pre-trigger Records is set to 2 and Post-trigger Records is set to 6, the number of
records for each waveform log set is 9:
9810 series - User manual Power quality
7EN05-0390-08 216
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